The Reservoir System Simulation (HEC-ResSim) software developed by the U.S. Army Corps of Engineers, Institute for Water Resources, Hydrologic Engineering Center is used to
model reservoir operations at one or more reservoirs for a variety of operational goals and constraints. The software simulates reservoir operations for flood management,
low flow augmentation and water supply for planning studies, detailed reservoir regulation plan investigations, and real-time decision support. HEC-ResSim can represent
both large and small scale reservoirs and reservoir systems through a network of elements (junctions, routing reaches, diversion, reservoirs) that the user builds. The
software can simulate single events or a full period-or-record using available time-steps. HEC-ResSim is a decision support tool that meets the needs of modelers performing reservoir
project studies as well as meeting the needs of reservoir regulators during real-time events.

The purpose of this site is to enhance the support services we provide to our customers. We have provided a number of resources here to help you download software, resolve
problems, report bugs, and suggest improvements to our products.